Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already state readOnlyHint=true, idempotentHint=true, openWorldHint=false, and destructiveHint=false, so safety is covered. The description adds that the data comes from the current platform build and that no arguments returns capabilities, but it does not describe return format or limits.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is short and front-loads the core resource being returned. The final fragment about no arguments is slightly abrupt but still useful and not wasteful.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a read-only lookup tool with two optional parameters and no output schema, the description identifies the kind of content returned but does not explain the result shape or how type/capability results differ. It is adequate but leaves some ambiguity about the returned artifact.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, and both optional parameters have examples in the schema. The description only adds that omitting arguments returns capabilities, which is useful but does not significantly expand parameter semantics beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description specifies the resource clearly: public Java types from a capability's api package and the foundation, including methods and record fields from the current platform build. It does not differentiate this from the sibling api_reference tool, so it falls short of a 5.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description says what happens without arguments, but it does not explain when to use this tool versus alternatives such as api_reference, search_docs, or get_guide. It provides only implied usage context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.